Oanna earns $10 per hour at her job. Last week, Joanna earned $400. Which equation can be used to determine the number of hours (h) Joanna worked last week?

Factor this polynomial completely x^2-64

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

Evaluate the expression for the given value of the variable. ∣-4b-8∣+∣-1-b^2 ∣+2b^3 ; b=-2